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Cleanup & add README, LICENSE, CI config

This commit is contained in:
Luke Street 2023-09-07 16:29:18 -04:00
parent 2b7cb77400
commit 2b472b0ccd
7 changed files with 544 additions and 91 deletions
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108
.github/workflows/build.yml vendored Normal file
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@ -0,0 +1,108 @@
name: Build
on:
push:
paths-ignore:
- '*.md'
- 'LICENSE*'
pull_request:
env:
CARGO_BIN_NAME: sjiswrap
CARGO_TARGET_DIR: target
jobs:
check:
name: Check
runs-on: windows-latest
env:
RUSTFLAGS: -D warnings
steps:
- name: Checkout
uses: actions/checkout@v3
- name: Setup Rust toolchain
uses: dtolnay/rust-toolchain@stable
with:
components: clippy
- name: Cargo check
run: cargo check --all-features --all-targets
- name: Cargo clippy
run: cargo clippy --all-features --all-targets
fmt:
name: Format
runs-on: ubuntu-latest
env:
RUSTFLAGS: -D warnings
steps:
- name: Checkout
uses: actions/checkout@v3
- name: Setup Rust toolchain
# We use nightly options in rustfmt.toml
uses: dtolnay/rust-toolchain@nightly
with:
components: rustfmt
- name: Cargo fmt
run: cargo fmt --all --check
build:
name: Build
strategy:
matrix:
include:
- platform: windows-latest
target: i686-pc-windows-msvc
name: windows-x86
build: build
fail-fast: false
runs-on: ${{ matrix.platform }}
steps:
- name: Checkout
uses: actions/checkout@v3
- name: Install dependencies
if: matrix.packages != ''
run: |
sudo apt-get -y update
sudo apt-get -y install ${{ matrix.packages }}
- name: Install cargo-zigbuild
if: matrix.build == 'zigbuild'
run: pip install ziglang==0.10.1.post1 cargo-zigbuild==0.17.0
- name: Setup Rust toolchain
uses: dtolnay/rust-toolchain@stable
with:
targets: ${{ matrix.target }}
- name: Cargo build
run: cargo ${{ matrix.build }} --release --all-features --target ${{ matrix.target }} --bin ${{ env.CARGO_BIN_NAME }}
- name: Upload artifacts
uses: actions/upload-artifact@v3
with:
name: ${{ matrix.name }}
path: |
${{ env.CARGO_TARGET_DIR }}/release/${{ env.CARGO_BIN_NAME }}
${{ env.CARGO_TARGET_DIR }}/release/${{ env.CARGO_BIN_NAME }}.exe
${{ env.CARGO_TARGET_DIR }}/${{ matrix.target }}/release/${{ env.CARGO_BIN_NAME }}
${{ env.CARGO_TARGET_DIR }}/${{ matrix.target }}/release/${{ env.CARGO_BIN_NAME }}.exe
if-no-files-found: error
release:
name: Release
if: startsWith(github.ref, 'refs/tags/')
runs-on: ubuntu-latest
needs: [ build ]
steps:
- name: Download artifacts
uses: actions/download-artifact@v3
with:
path: artifacts
- name: Rename artifacts
working-directory: artifacts
run: |
mkdir ../out
for i in */*/release/$CARGO_BIN_NAME*; do
mv "$i" "../out/$(sed -E "s/([^/]+)\/[^/]+\/release\/($CARGO_BIN_NAME)/\2-\1/" <<< "$i")"
done
ls -R ../out
- name: Release
uses: softprops/action-gh-release@v1
with:
files: out/*

2
Cargo.lock generated
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@ -52,7 +52,7 @@ checksum = "bc62ccb14881da5d1862cda3a9648fb4a4897b2aff0b2557b89da44a5e550b7c"
[[package]]
name = "sjiswrap"
version = "0.1.0"
version = "1.0.0"
dependencies = [
"anyhow",
"encoding_rs",

19
Cargo.toml
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@ -1,7 +1,24 @@
[package]
name = "sjiswrap"
version = "0.1.0"
description = "UTF-8 to Shift JIS wrapper for old compilers."
authors = ["Luke Street <luke@street.dev>"]
license = "MIT OR Apache-2.0"
version = "1.0.0"
edition = "2021"
publish = false
repository = "https://github.com/encounter/sjiswrap"
readme = "README.md"
categories = ["command-line-utilities"]
# Size optimizations
[profile.release]
codegen-units = 1
lto = true
opt-level = "z"
panic = "abort"
[features]
debug = []
[dependencies]
anyhow = "1.0.72"

201
LICENSE-APACHE Normal file
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@ -0,0 +1,201 @@
Apache License
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5. Submission of Contributions. Unless You explicitly state otherwise,
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Work (including but not limited to damages for loss of goodwill,
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Copyright 2023 Luke Street.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
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LICENSE-MIT Normal file
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@ -0,0 +1,21 @@
MIT License
Copyright 2023 Luke Street.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

54
README.md Normal file
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@ -0,0 +1,54 @@
# sjiswrap [![Build Status]][actions]
[Build Status]: https://github.com/encounter/sjiswrap/actions/workflows/build.yml/badge.svg
[actions]: https://github.com/encounter/sjiswrap/actions
UTF-8 to Shift JIS wrapper for old 32-bit Windows compilers.
When the wrapped executable reads a text file, it will be encoded from UTF-8 to Shift JIS on the fly.
Encoded file extensions:
- `.c`
- `.cc`
- `.cp`
- `.cpp`
- `.cxx`
- `.h`
- `.hh`
- `.hp`
- `.hpp`
- `.hxx`
## Usage
Download the latest release from [here](https://github.com/encounter/sjiswrap/releases).
```shell
$ sjiswrap.exe <exe> [args...]
```
## Building
```shell
$ cargo build --target i686-pc-windows-msvc --release
```
For smaller binaries:
```shell
$ cargo +nightly build -Z build-std=std,panic_abort --target i686-pc-windows-msvc --release
```
## License
Licensed under either of
* Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
* MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
at your option.
### Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as
defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

230
src/main.rs
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@ -1,5 +1,4 @@
#![allow(non_snake_case)]
#![allow(non_snake_case, clippy::let_and_return)]
use std::{
borrow::Cow,
cmp::min,
@ -13,15 +12,15 @@ use std::{
sync::Mutex,
};
use anyhow::Result;
use anyhow::{Context, Result};
use encoding_rs::SHIFT_JIS;
use lazy_static::lazy_static;
use windows::{
core::PCSTR,
core::{PCSTR, PCWSTR},
Win32::{
Foundation::{
CloseHandle, GetLastError, SetLastError, BOOL, GENERIC_ACCESS_RIGHTS, GENERIC_READ,
HANDLE,
HANDLE, INVALID_HANDLE_VALUE,
},
Security::SECURITY_ATTRIBUTES,
Storage::FileSystem::{
@ -33,29 +32,91 @@ use windows::{
},
};
/// Whether to hook and encode a file.
fn is_text_file(path: &str) -> bool {
path.ends_with(".c")
|| path.ends_with(".cc")
|| path.ends_with(".cp")
|| path.ends_with(".cpp")
|| path.ends_with(".cxx")
|| path.ends_with(".h")
|| path.ends_with(".hh")
|| path.ends_with(".hp")
|| path.ends_with(".hpp")
|| path.ends_with(".hxx")
}
macro_rules! debug_println {
($($arg:tt)*) => {
#[cfg(feature = "debug")]
{
// Writing to console will overwrite LastError
let err = unsafe { GetLastError() };
eprintln!($($arg)*);
unsafe { SetLastError(err) };
}
};
}
fn main() -> Result<()> {
let args: Vec<OsString> = std::env::args_os().collect();
if args.len() < 2 {
println!("Usage: {} <exe>", args[0].to_string_lossy());
exit(1);
}
let path = PathBuf::from(&args[1]);
let parent = CString::new(
path.parent()
.context("Failed to get executable parent directory")?
.to_string_lossy()
.as_ref(),
)
.unwrap();
let parent =
get_full_path(&parent).expect("Failed to get absolute executable parent directory");
unsafe { SetDllDirectoryA(PCSTR(parent.as_ptr() as *const u8)) }
.ok()
.context("SetDllDirectoryA() failed")?;
debug_println!("SetDllDirectoryA({:?})", parent.to_string_lossy());
let mut buf = Vec::new();
File::open(&path)
.with_context(|| format!("Failed to open executable: '{}'", path.display()))?
.read_to_end(&mut buf)
.with_context(|| format!("Failed to read executable: '{}'", path.display()))?;
let mut hooks = HashMap::new();
hooks.insert("kernel32.dll!GetCommandLineA".into(), hook_GetCommandLineA as *const c_void);
hooks.insert("kernel32.dll!GetCommandLineW".into(), hook_GetCommandLineW as *const c_void);
hooks.insert("kernel32.dll!CreateFileA".into(), hook_CreateFileA as *const c_void);
hooks.insert("kernel32.dll!CreateFileW".into(), hook_CreateFileW as *const c_void);
hooks.insert("kernel32.dll!GetFileSize".into(), hook_GetFileSize as *const c_void);
hooks.insert("kernel32.dll!CloseHandle".into(), hook_CloseHandle as *const c_void);
hooks.insert("kernel32.dll!ReadFile".into(), hook_ReadFile as *const c_void);
hooks.insert("kernel32.dll!SetFilePointer".into(), hook_SetFilePointer as *const c_void);
unsafe { memexec::memexec_exe_with_hooks(&buf, &hooks) }.expect("Failed to execute");
Ok(())
}
/// File that has been read into memory and encoded.
struct FileHandle {
data: Vec<u8>,
pos: u64,
}
/// Global state shared between hooks.
#[derive(Default)]
struct GlobalState {
cmdline: Option<CString>,
file_handles: HashMap<isize, FileHandle>,
}
lazy_static! {
static ref GLOBAL_STATE: Mutex<GlobalState> = Default::default();
}
fn get_full_path(path: &CStr) -> Result<CString> {
let mut buf = [0u8; 4096];
let len =
unsafe { GetFullPathNameA(PCSTR(path.as_ptr() as *const u8), Some(buf.as_mut()), None) };
if len == 0 {
return Err(std::io::Error::last_os_error().into());
}
Ok(unsafe { CString::from_vec_with_nul_unchecked(buf[..len as usize + 1].to_vec()) })
}
/// `GetCommandLineA` hook. Skips our own executable name and replaces the subprocess path with an absolute path.
extern "stdcall" fn hook_GetCommandLineA() -> PCSTR {
let mut guard = GLOBAL_STATE.lock().expect("Failed to lock global state");
if let Some(str) = &guard.cmdline {
@ -122,15 +183,12 @@ extern "stdcall" fn hook_GetCommandLineA() -> PCSTR {
PCSTR(guard.cmdline.as_ref().unwrap().as_ptr() as *const u8)
}
fn is_text_file(path: &str) -> bool {
path.ends_with(".c")
|| path.ends_with(".cc")
|| path.ends_with(".cp")
|| path.ends_with(".cpp")
|| path.ends_with(".h")
|| path.ends_with(".hpp")
/// `GetCommandLineW` hook. Currently unsupported.
extern "stdcall" fn hook_GetCommandLineW() -> PCSTR {
panic!("GetCommandLineW() is not supported");
}
/// `CreateFileA` hook. If it's a text file, read it into memory and encode it as Shift-JIS.
extern "stdcall" fn hook_CreateFileA(
lpFileName: PCSTR,
dwDesiredAccess: GENERIC_ACCESS_RIGHTS,
@ -151,7 +209,7 @@ extern "stdcall" fn hook_CreateFileA(
hTemplateFile,
)
}
.unwrap_or(HANDLE(0));
.unwrap_or(INVALID_HANDLE_VALUE);
let err = unsafe { GetLastError() };
let path = unsafe { CStr::from_ptr(lpFileName.as_ptr() as *const c_char) }.to_string_lossy();
@ -181,16 +239,9 @@ extern "stdcall" fn hook_CreateFileA(
match encoded {
Cow::Borrowed(_) => {
// No modifications were made, use the original data
// println!("READ FILE {:#X}, size {:#X} (UNCHANGED)", ret.0, filesize);
guard.file_handles.insert(ret.0, FileHandle { data, pos: 0 });
}
Cow::Owned(data) => {
println!(
"READ FILE {:#X}, size {:#X} (CHANGED: {:#X})",
ret.0,
filesize,
data.len()
);
guard.file_handles.insert(ret.0, FileHandle { data, pos: 0 });
}
}
@ -198,42 +249,54 @@ extern "stdcall" fn hook_CreateFileA(
}
}
}
// println!("CreateFileA({}, {:#X}) = {:#X}", path, dwDesiredAccess.0, ret.0 as u32);
debug_println!("CreateFileA({}, {:#X}) = {:#X}", path, dwDesiredAccess.0, ret.0 as u32);
unsafe { SetLastError(err) };
ret
}
/// `CreateFileW` hook. Currently unsupported.
extern "stdcall" fn hook_CreateFileW(
_lpFileName: PCWSTR,
_dwDesiredAccess: GENERIC_ACCESS_RIGHTS,
_dwShareMode: FILE_SHARE_MODE,
_lpSecurityAttributes: *const SECURITY_ATTRIBUTES,
_dwCreationDisposition: FILE_CREATION_DISPOSITION,
_dwFlagsAndAttributes: FILE_FLAGS_AND_ATTRIBUTES,
_hTemplateFile: HANDLE,
) -> HANDLE {
panic!("CreateFileW() is not supported");
}
/// `GetFileSize` hook. If the file was read into memory, return that size instead.
extern "stdcall" fn hook_GetFileSize(hFile: HANDLE, lpFileSizeHigh: *mut u32) -> u32 {
if !hFile.is_invalid() {
let guard = GLOBAL_STATE.lock().expect("Failed to lock global state");
if let Some(file) = guard.file_handles.get(&hFile.0) {
// println!("OVERRIDE GetFileSize({:#X}) = {:#X}", hFile.0, file.data.len() as u32);
debug_println!("OVERRIDE: GetFileSize({:#X}) = {:#X}", hFile.0, file.data.len() as u32);
return file.data.len() as u32;
}
}
let ret = unsafe { GetFileSize(hFile, Some(lpFileSizeHigh)) };
// let err = unsafe { GetLastError() };
// println!("GetFileSize({:#X}, {:?}) = {:#X}", hFile.0, lpFileSizeHigh, ret);
// unsafe { SetLastError(err) };
debug_println!("GetFileSize({:#X}, {:?}) = {:#X}", hFile.0, lpFileSizeHigh, ret);
ret
}
/// `CloseHandle` hook. If the file was read into memory, free it.
extern "stdcall" fn hook_CloseHandle(hObject: HANDLE) -> BOOL {
if !hObject.is_invalid() {
let mut guard = GLOBAL_STATE.lock().expect("Failed to lock global state");
if guard.file_handles.remove(&hObject.0).is_some() {
// println!("REMOVED HANDLE {:#X}", hObject.0);
debug_println!("File handle removed: {:#X}", hObject.0);
}
}
let ret = unsafe { CloseHandle(hObject) };
// let err = unsafe { GetLastError() };
// println!("CloseHandle({:#X}) = {:#X}", hObject.0, ret.0);
// unsafe { SetLastError(err) };
debug_println!("CloseHandle({:#X}) = {:#X}", hObject.0, ret.0);
ret
}
/// `ReadFile` hook. If the file was read into memory, read from that instead.
extern "stdcall" fn hook_ReadFile(
hFile: HANDLE,
lpBuffer: *mut c_void,
@ -259,10 +322,14 @@ extern "stdcall" fn hook_ReadFile(
if !lpNumberOfBytesRead.is_null() {
unsafe { *lpNumberOfBytesRead = count };
}
// println!(
// "OVERRIDE ReadFile({:#X}, {:?}, {:#X}, {:?}) = {:#X}",
// hFile.0, lpBuffer, nNumberOfBytesToRead, lpNumberOfBytesRead, count
// );
debug_println!(
"OVERRIDE: ReadFile({:#X}, {:?}, {:#X}, {:?}) = {:#X}",
hFile.0,
lpBuffer,
nNumberOfBytesToRead,
lpNumberOfBytesRead,
count
);
return true.into();
}
}
@ -276,15 +343,18 @@ extern "stdcall" fn hook_ReadFile(
Some(lpOverlapped),
)
};
let err = unsafe { GetLastError() };
// println!(
// "ReadFile({:#X}, {:?}, {:#X}, {:?}) = {:#X}",
// hFile.0, lpBuffer, nNumberOfBytesToRead, lpNumberOfBytesRead, ret.0
// );
unsafe { SetLastError(err) };
debug_println!(
"ReadFile({:#X}, {:?}, {:#X}, {:?}) = {:#X}",
hFile.0,
lpBuffer,
nNumberOfBytesToRead,
lpNumberOfBytesRead,
ret.0
);
ret
}
/// `SetFilePointer` hook. If the file was read into memory, set the position in that instead.
extern "stdcall" fn hook_SetFilePointer(
hFile: HANDLE,
lDistanceToMove: i32,
@ -308,9 +378,13 @@ extern "stdcall" fn hook_SetFilePointer(
file_size,
);
file.pos = pos;
println!(
debug_println!(
"OVERRIDE SetFilePointer({:#X}, {:#X}, {:?}, {}) = {:#X}",
hFile.0, distance_to_move, lpDistanceToMoveHigh, dwMoveMethod.0, pos
hFile.0,
distance_to_move,
lpDistanceToMoveHigh,
dwMoveMethod.0,
pos
);
if !lpDistanceToMoveHigh.is_null() {
unsafe { *lpDistanceToMoveHigh = (pos >> 32) as i32 };
@ -321,46 +395,24 @@ extern "stdcall" fn hook_SetFilePointer(
let ret =
unsafe { SetFilePointer(hFile, lDistanceToMove, Some(lpDistanceToMoveHigh), dwMoveMethod) };
let err = unsafe { GetLastError() };
// println!(
// "SetFilePointer({:#X}, {:#X}, {:?}, {}) = {:#X}",
// hFile.0, lDistanceToMove, lpDistanceToMoveHigh, dwMoveMethod.0, ret
// );
unsafe { SetLastError(err) };
debug_println!(
"SetFilePointer({:#X}, {:#X}, {:?}, {}) = {:#X}",
hFile.0,
lDistanceToMove,
lpDistanceToMoveHigh,
dwMoveMethod.0,
ret
);
ret
}
fn main() -> Result<()> {
let args: Vec<OsString> = std::env::args_os().collect();
if args.len() < 2 {
println!("Usage: {} <exe>", args[0].to_string_lossy());
exit(1);
/// Get the absolute path of a file.
fn get_full_path(path: &CStr) -> Result<CString> {
let mut buf = [0u8; 4096];
let len =
unsafe { GetFullPathNameA(PCSTR(path.as_ptr() as *const u8), Some(buf.as_mut()), None) };
if len == 0 {
return Err(std::io::Error::last_os_error().into());
}
let path = PathBuf::from(&args[1]);
let parent = CString::new(
path.parent()
.expect("Failed to get executable parent directory")
.to_string_lossy()
.as_ref(),
)
.unwrap();
let parent =
get_full_path(&parent).expect("Failed to get absolute executable parent directory");
unsafe { SetDllDirectoryA(PCSTR(parent.as_ptr() as *const u8)) }
.expect("SetDllDirectoryA() failed");
// println!("SetDllDirectoryA({:?})", parent.to_string_lossy());
let mut buf = Vec::new();
File::open(&path).unwrap().read_to_end(&mut buf).unwrap();
let mut hooks = HashMap::new();
hooks.insert("kernel32.dll!GetCommandLineA".into(), hook_GetCommandLineA as *const c_void);
hooks.insert("kernel32.dll!CreateFileA".into(), hook_CreateFileA as *const c_void);
hooks.insert("kernel32.dll!GetFileSize".into(), hook_GetFileSize as *const c_void);
hooks.insert("kernel32.dll!CloseHandle".into(), hook_CloseHandle as *const c_void);
hooks.insert("kernel32.dll!ReadFile".into(), hook_ReadFile as *const c_void);
hooks.insert("kernel32.dll!SetFilePointer".into(), hook_SetFilePointer as *const c_void);
unsafe { memexec::memexec_exe_with_hooks(&buf, &hooks) }.unwrap();
Ok(())
Ok(unsafe { CString::from_vec_with_nul_unchecked(buf[..len as usize + 1].to_vec()) })
}